Seeing a call drop or get a "Call Failed" message on your Sony Xperia 1 VI is a real headache, especially on a phone built for communication. This usually means your phone is struggling to maintain a stable connection with your carrier's network.
Weak signal, a minor software hiccup, or a single incorrect setting can be the culprit. Let's run through the most effective fixes, starting with the quickest ones you can try right now.
Toggle Airplane Mode
The fastest way to refresh your mobile connection is to use Airplane Mode. This forces your phone to disconnect from and then reconnect to the cellular network, clearing any temporary glitches.
Just swipe down from the top of your screen to open the Quick Settings panel. Tap the Airplane Mode icon to turn it on, wait about 15 seconds, and then tap it again to turn it off. Give your phone a moment to re-register on the network before trying another call.
Check Your Signal Strength
This is the most common reason for call failures. Look at the signal bars in the top-right corner of your Xperia's screen. If you have one bar or see an "X," you're in a weak coverage area.
Try moving to a different location, near a window, or even stepping outside. Building materials like concrete and metal can significantly block cellular signals.
Force Restart Your Xperia
A simple reboot can clear out temporary software bugs that might be interfering with the phone app or radio. For the Xperia 1 VI, press and hold the Power button and the Volume Up button together for about 10 seconds.
Keep holding until you feel the phone vibrate and the Sony logo appears on the screen. This is a soft reset and won't delete any of your data.
Check for Call Blocking or Do Not Disturb
It's worth making sure you haven't accidentally blocked the number or that a focus mode isn't silencing calls. Open your Phone app and tap the three-dot menu in the top right, then go to Settings > Blocked numbers.
Also, swipe down your notification shade and check if "Do not disturb" or a Focus mode icon is active. Tap it to turn it off if you're expecting calls.
Update Your Date, Time, and Carrier Services
Incorrect system time can sometimes cause authentication issues with the network. Go to Settings > System > Date & time and make sure "Use network-provided time" is switched on.
While you're in settings, also check for carrier services updates. Go to Settings > System > System update. Sometimes these background updates include critical connectivity improvements from your mobile provider.
Verify Your Mobile Data and Network Mode
Ensure your mobile data is actually enabled, especially if you're trying to make a call over VoLTE (Voice over LTE). Go to Settings > Network & internet > Mobile network and confirm "Mobile data" is on.
You can also try switching your preferred network type. In the same menu, tap Preferred network type. If it's set to "5G," try switching it to "4G" or "3G" temporarily to see if the call goes through, then switch it back.
Inspect and Re-seat Your SIM Card
A loose, dirty, or faulty SIM card is a classic cause of call problems. Use the SIM eject tool that came with your Xperia (a small paperclip works) to pop out the tray on the side of the phone.
Carefully remove the SIM card, gently wipe the gold contacts with a soft, dry cloth, and then reinsert it firmly. Make sure the tray clicks back into place securely. If you have access to another phone, testing your SIM card in it can tell you if the card itself is the problem.
Update Your Android Software
Software updates often contain bug fixes for cellular connectivity and the phone dialer. Sony's updates can be less frequent than some brands, so it's important to install them when they arrive.
Connect to Wi-Fi, then go to Settings > System > System update to check for and install any available updates. I'd make sure your battery is above 50% before starting the update process.
Reset Your Network Settings
This is a more thorough step that clears all your saved Wi-Fi networks, Bluetooth pairings, and cellular network preferences. It won't delete your photos, apps, or personal files, but you will have to re-enter Wi-Fi passwords.
To do this, go to Settings > System > Reset options. Tap on Reset Wi-Fi, mobile & Bluetooth and confirm. Your phone will restart, and you can then reconfigure your network connections.
Contact Your Mobile Carrier
If you've tried everything here and calls are still failing, the issue is likely on your carrier's end. There could be a local network outage, a problem with your account, or your SIM card may need to be replaced.
Call your carrier's customer service from another phone if possible. They can check for outages, reprovision your line on their network, or send you a new SIM card. They can also confirm if your Xperia 1 VI is properly configured for their network services like VoLTE and Wi-Fi Calling.
